I used a Sonic Tronics. Looks like 11 bucks on their website, but I think I paid more like 7 at LHS. It could have been more ...

http://www.sonictronics.com/products...ugs/prod03.htm

It has a spring loaded clip (push in and turn) which holds it on the plug ... no problems so far. Ground wire went between the engine and mounting bolt. It has a "glow plug" looking end that sits in a angle bracket. With a hole in the cowl the diameter of a glow plug clip, the remote glow plug sits about flush with the cowl (body of it is inside the cowl).

No problem with engine heating yet. I've got a nice size hole in the front of the cowl and there seems to be plenty of opening at the back of the cowl for air flow. I don't think it'll be a problem.

I fly a 33% FiberClassics Extra and I bought the UCD to learn to hover at low altitude (didn't have the guts to bring the FC too close to the ground). I've been VERY please with the hovering of this thing. I don't think the plane is for everyone, but if you want to learn to hover it's the ticket. Good torque rolling with the Saito 100 and APC 16x4w combo. The Cline reg works great .... I get a lot of comments at the field at how smooth the engine runs.

Sorry to hear you didn't like yours, Steve.

JS